It is easier to explain from the perspective of the offense. If the umpire's changed or delayed call resulted in a runner or BR being put out on the original call, when they would not have been put out (or would have presumably reacted differently) if the correct call had been made at the time, then the offense has ben put in jeopardy by the umpire's changed or late call.
An example would be a delayed IF call. Umpire does not call IF when it should be called. Ball is dropped. Runners believe the force is in effect and attempt to advance and are put out.
Sure, it is true that the IF is a live ball, and that the runners COULD have done the same thing even if the IF had been called, but the judgment of the umpire (c)(w)ould be that the runners were placed in jeopardy be the delay since they then assumed they were forced to advance.